I've had reliable operation from Little Giant and Superior Electric pumps as small coolant pumps. The small pumps are not expensive so there is no excuse for skimping on quality in my opinion. Spindle coolant is too important to take unnecessary risks on a pump of questionable quality. I particularly like the magnetic drive pumps. These are the sorts of pumps that people leave in a lily pond all year long, pumping algae and koi carp crap sludge.
Here are a couple of eBay items you might want to consider. 254049597655 382673181410 The small Superior Electric pumps currently on eBay seemed to be imitations. The worst part about using one of these small submersible pond or fountain pumps is the plumbing. They probably won't have the plastic fitting you'll need. You probably need 8mm internal diameter tubing for the spindle motor and the pump's tube fittings are usually much larger. You may need to epoxy a fitting into the pump's outlet or tap one of their plastic friction fittings. The good news is, it's a submersible pump, so it doesn't matter if the fitting leaks. Sorry that I can't help you with the Chinese VFD. I have a few similar Chinese VFDs (two home brew CNC routers and a 3/4 HP CNC'd Clausing lathe) and they all work well. I bought them from eBay sellers with good reputations. For the two CNC routers, I bought the spindle motor and VFD as a matched pair and they were perfectly configured from the factory. I needed to do a little programming on the lathe VFD, but the registers were reasonably well documented in the manual and there are YouTube videos that described how to configure a genuine Huanyang VFD for an arbitrary sized spindle motor. It wasn't difficult, but I probably spent an hour fiddling with it. It's handy to watch YouTube videos like this on the LinuxCNC machine that I'm configuring. It's sad that someone is selling what are essentially cut rate imitation Huanyang VFDs. PRO TIP: The Huanyang VFDs emit a lot of EMI. Preferably, use HDMI for video. If not, use the best shielded VGA cables you can buy. Use shielded continuous flex cable between the VFD and spindle motor and ground the shield in the electrical panel. On 3/27/19 4:39 PM, Gene Heskett wrote: > While trying to get a reverse control over this POS, I noted that the > default was reversed, so I traded the 2 U & V wires to the motor to make > it run fwd. > > This is toward the end of March, but as of this afternoon its default, > can't change it w/o moving UV again, is now its running bass ackwards > again. > > Then, I note after I had unplugged the hoses from the pump in order to > re-route them thru the new cable chains, that the pump wasn't. Power is > being switched on queue.. > > Pull pump out of water, note its slightly warm. Made sure power was off > and popped the end covers, discover its a PM armature with pretty strong > cogging. Put front cover back on as its also the front bearing. Apply > power, and 8 or 10 pokes at turning it, It takes off again. Its not > stiff or dragging. Stop AC to it, stops, start it, runs. Several times. > So obviously it can't be trusted. > > I've a mind to just order another pump and a vfd. I am plumb sick of > screwing with this documentless piece of Chinese shit vfd. I want to > actually USE it before I fall over... > > > Cheers, Gene Heskett _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
